I went for follow up with my surgeon. My radiation treatment was 3 months ago. He notice when examine my incision there was a lump by it. He wants me to have a mammogram in three months and then see him a week later. I asked him is this scar tissue. He said it might but you never can be too careful. Can they notice difference between scar tissue and cancer from a mammogram? I hoping it is just scar tissue. My surgery from my 2nd lumpectomy was only 6 months ago. I was stage 1 with negative lymph nodes.